Fourier Synthesis - Manfred Thole
A periodic signal can be described by a Fourier decomposition as a Fourier series, i.e. as a sum of sinusoidal and cosinusoidal oscillations. By reversing this procedure a periodic signal can be generated by superimposing sinusoidal and cosinusoidal waves.
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Fractal Explorer Kit - Tom Harrington
Java applets show fractals based on the Mandelbrot Set, the Julia Set, and Newton's method. Pictures grow more detailed in a series of iterations; zoom in to see a close-up of the center. A brief FAQ explains the methods behind these different types
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Fractal Explorer - Yuri Alkin
A Java applet that allows the user to explore infinite fractal surfaces in real time. Features unique algorithms and multiple fractal types and color schemes. Images are not based on Mandelbrot or Julia sets.
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Fractal Images - Sharon Webb
Fractal images made for the most part using a software application called Flarium24. Galleries contain about 15 images each and should be viewed in hi-color or truecolor settings. Tilable images that can be downloaded for wallpaper are also available.
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Fractal Mountains - Matthew Caryl
Fractal systems repeat the same type of features on smaller and smaller scales when you look closer and closer. Mountains are a natural example of this - a mountain range is rugged - a mountain is rugged - a valley on the mountain is rugged - and the
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Fractals - Martin Sandin
A Java applet that allows you to zoom in on the Mandelbrot set. Buttons are in Swedish, but the interface is straightforward and translation is provided. Also includes a few sample images.
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Fractional Tree Calculator - Henryk Trappmann
Fractional trees are a new kind of number (extra to quaternions, octonions, non-standard reals, Conway numbers, etc.), an algebraic generalization of fractional numbers. Experiment with this web application
to get a first impression.
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Free Daily Sudoku Puzzles
For this canonical puzzle the aim is to fill every square in the 9x9 grid with a number 1-9. Every row, every column, and every 3x3 box must contain the digits 1 through 9. Free Daily Sudoku has online puzzles and daily puzzles by email or RSS feed. Also
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Free Doughnuts - Web Feats Workshop II
You have a piece of cardboard 24 by 15 inches. Your problem is to figure out how much to cut out of each corner to make the box with the biggest (maximum) volume. Use the applet to explore how changing the size of the cutout changes the box. This workshop
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Free Online Unit Converter
Convert quantities of mass, area, angle, length, volume, pressure, temperature, and data storage by selecting the unit of measures from pull-down menus. This utility from PDFConverter.com also adjusts the current time according to time zones.
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Free Puzzles - Jimmie Dean
A collection of puzzles and brainteasers, divided into geometry, logic, math, weight, moves, and miscellaneous. Each puzzle includes a hint, and solutions are available through e-mail. Online games and puzzles include a chess knight game and Hangman.
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The Fruit Game
An interactive game in which players take turns removing fruit from the table according to the rules. The player who removes the last fruit from the table loses. Based on the mathematical puzzler known as the game of Nim.
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Fuel the Brain - Dynamics of Design
Educational games, interactives, printables, teacher guides, articles and tutorials, and seasonal resources. The "inevitable" product of an elementary teacher and her graphic/web designer spouse, Fuel the Brain's most popular Flash games include Jelly
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Funderstanding Roller Coaster
Java simulation intended for students who want to design a roller coaster and educators who want to use an interactive activity to simulate the application of physics. Includes information on the following topics: acceleration; centripetal force; energy;
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Furbles - Alec McEachran
Furbles are engaging creatures intended to help youngsters engage with probability and statistics--to make concrete the connection between data and the representations of data. It may be used on an interactive whiteboard, and is flexible enough for teachers
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Future of Leap Seconds - Steve Allen
Allen, an astronomer, discusses leap years, leap seconds -- and how to avoid their use when redefining Coordinated Universal Time (UTC): three pictures that show the situation; elapsed time (JavaScript that shows POSIX's inability to provide an interface
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Gadgets - Jan Gombert
Gombert's five "gadgets" provide simple challenges that combine addition, multiplication, and two- or three-dimensional geometry. Balancing Act shows three values on a beam to balance by addition. Make a given perimeter or area by resizing the figure
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GalaxyGoo
An interdisciplinary, volunteer thinktank dedicated to exploring expressions of science and math with online technologies, for public benefit. Read interviews of scientists; explore math such as the sine curve with Flash, participate in forums and blogs,
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The Game of Chaos - Juergen Giesen
This applet performs the following game at varying speeds: Choose a random starting point (o) within the triangle ABC. Roll a die. Connect the point with point A, when you roll 1 or 2; with point B, when you roll 3 or 4; with point C, when you roll 5
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Games2Learn
Vendor of educational games, software, and activities for both parents and teachers. The site may be searched by category (Math, Spatial Learning, Science and Tech, etc.), grade level, game type, or personality profile (Planner, Peacekeeper, Producer,
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Games for the Brain - Philipp Lenssen
Race the "IQ Score" clock while playing JavaScript brain teasers such as NumberCruncher (perform arithmetic calculations following order of operations) and Marsmoney (calculate the values of different currencies). The site also features several memory,
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GAMES Group - The University of Alberta
GAMES is a research group for Game-playing, Analytical methods, Minimax search and Empirical Studies. It produces real-time programs for strategic game such as Amazons, Awari, Checkers, Chess, Domineering, Go, Hex, Lines of Action, Othello, Poker, RoShamBo,
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